[flas9sd]

you could try Zealdocs - it was a reason to go reading more of the projects own documentation pages. There are converters for whatever-doc/ssg-framework a project uses to Docset, the packaged format it relies on. Though ignoring that, how approachable the docs are to different levels of experience is another thing.

I learned heaps from treating a REPL as an (offline) escape room, in terms of how to get inline help, variable introspection and debugging tricks. Not every language offers a convenient one though.